[PATCH 6.18 221/333] drm/xe/xe2_hpg: Correct implementation of Wa_16025250150

Greg Kroah-Hartman
2026-03-17T17:20:52Z

From: Matt Roper <matthew.d.roper@intel.com>

commit 89865e6dc8487b627302bdced3f965cd0c406835 upstream.

Wa_16025250150 asks us to set five register fields of the register to
0x1 each. However we were just OR'ing this into the existing register
value (which has a default of 0x4 for each nibble-sized field) resulting
in final field values of 0x5 instead of the desired 0x1. Correct the
RTP programming (use FIELD_SET instead of SET) to ensure each field is
assigned to exactly the value we want.

Cc: Aradhya Bhatia <aradhya.bhatia@intel.com>
Cc: Tejas Upadhyay <tejas.upadhyay@intel.com>
Cc: stable@vger.kernel.org # v6.16+
Fixes: 7654d51f1fd8 ("drm/xe/xe2hpg: Add Wa_16025250150")
Reviewed-by: Ngai-Mint Kwan <ngai-mint.kwan@linux.intel.com>
Link: https://patch.msgid.link/20260227164341.3600098-2-matthew.d.roper@intel.com
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
(cherry picked from commit d139209ef88e48af1f6731cd45440421c757b6b5)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpu/drm/xe/xe_wa.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)

--- a/drivers/gpu/drm/xe/xe_wa.c
+++ b/drivers/gpu/drm/xe/xe_wa.c
@@ -255,12 +255,13 @@ static const struct xe_rtp_entry_sr gt_w

{ XE_RTP_NAME("16025250150"),
XE_RTP_RULES(GRAPHICS_VERSION(2001)),
- XE_RTP_ACTIONS(SET(LSN_VC_REG2,
- LSN_LNI_WGT(1) |
- LSN_LNE_WGT(1) |
- LSN_DIM_X_WGT(1) |
- LSN_DIM_Y_WGT(1) |
- LSN_DIM_Z_WGT(1)))
+ XE_RTP_ACTIONS(FIELD_SET(LSN_VC_REG2,
+ LSN_LNI_WGT_MASK | LSN_LNE_WGT_MASK |
+ LSN_DIM_X_WGT_MASK | LSN_DIM_Y_WGT_MASK |
+ LSN_DIM_Z_WGT_MASK,
+ LSN_LNI_WGT(1) | LSN_LNE_WGT(1) |
+ LSN_DIM_X_WGT(1) | LSN_DIM_Y_WGT(1) |
+ LSN_DIM_Z_WGT(1)))
},

/* Xe2_HPM */